Example usage of snow

snow_example.sh

#!/bin/sh	  	      		  	   	    	      	      
       	 	  		       	      	 	       	    	 
######################################################################    
# Example usage of SNOW (Steganographic Nature Of Whitespace)       
# http://www.darkside.com.au/snow/	  	   	    	      	   
#      	  
# See also: http://www.cabinetmagazine.org/issues/40/sherman.php
######################################################################

if ! [ -d snow_example ]
then
  mkdir snow_example
fi
cd snow_example

if ! which snow
then
  if ! [ -d snow-20091217 ]
  then
    curl -O http://www.darkside.com.au/snow/snow-20091217.tar.gz
    tar xvf snow-20091217.tar.gz
    cd snow-20091217
    make
    mkdir bin
    mv snow bin/snow
    cd ..
  fi
  PATH="$(pwd)/snow-20091217/bin:$PATH"
fi

cat >infile <<DOC
The Project Gutenberg EBook of A Modest Proposal, by Jonathan Swift

Title: A Modest Proposal
       For preventing the children of poor people in Ireland,
       from being a burden on their parents or country, and for
       making them beneficial to the publick - 1729

Author: Jonathan Swift

Posting Date: July 27, 2008 [EBook #1080]
Release Date: October 1997

Language: English

A MODEST PROPOSAL

For preventing the children of poor people in Ireland...
DOC

echo '# Encode'
echo '$ snow -C -m "a man a plan a canal" -p "panama" infile outfile'
snow -C -m "a man a plan a canal" -p "panama" infile outfile

echo '# Decode'
echo '$ snow -C -p "panama" outfile'
snow -C -p "panama" outfile

echo
cd ..